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Error while opening xls contents

Hello,

I am getting below error when I try to open the attached contents using Aspose.Cells(V4.4.3.19). I need to convert these contents in to 2007 format.

Contents :
excel tab 1.xls
excel tab 2.xls
FSIDMT_SS_Hypo Table_Pro.xls

Error :
Could not open the input Excel file.
Object reference not set to an instance of an object.

what could be the reason for this error?

Thanks,
Manju.

Hi,

Please try the attached version/latest fix, I have tested opening/saving your files with it, all the files work fine with the attached version.

Thank you.